<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="../static/js/wow/animate.css">
  <style>
    .mask {
      overflow: hidden;
      position: relative;
    }

    .mask_anim,
    .mask_anim2 {
      position: absolute;
      left: 0;
      top: 0;
      width: 101%;
      height: 100%;
      background-color: #f5f5f5;
      -webkit-transition-timing-function: ease;
      transition-timing-function: ease;
      z-index: 2;
      visibility: hidden;
      margin-left: -1px;
    }

    .mask_anim_inner {
      visibility: hidden;
      z-index: 1;
    }

    .mask_anim_inner.is-animated {
      visibility: visible;
    }

    .mask_anim.is-animated,
    .mask_anim2.is-animated {
      -webkit-transform-origin: right center;
      transform-origin: right center;
      -webkit-transform: translateX(0) scaleX(0) !important;
      transform: translateX(0) scaleX(0) !important;
    }

    .h300vh {
      height:300vh;
    }
  </style>
</head>

<body>
  <section class="h300vh"></section>
  <div id="index-01-back" class="mask">
    <!-- <span class="mask_anim"></span> -->
    <a href="#">
      <img class="w100" src="https://www.sunsemweb.com/data/template/preview_67/static/images/index-01-02.jpg" alt="">
    </a>
  </div>
  <section class="h300vh"></section>

  <script src="../static/js/wow/wow.min.js"></script>
  <script>
    new WOW().init();
  </script>
</body>

</html>